Technical details
Korea Rail Network Authority

August 2012: start date of Basic Design

February 2013: start of Detailed Design

January 2014: start of construction

2017: construction completed

2018: bridge inaugurated

Tender and Detailed Design
Dodam, South Korea
Arch + Truss Bridge

The Dodam-Yeongcheon 480 m long railway bridge was designed as a multi-span simply-supported structure. Combination of five steel spans – alternate three bowstrings and two under-slab trusses. This concept, devised by SYSTRA during the design phase of the tender, creates an impression of a wave over the Namhan river that is in harmony with the surrounding mountains.

The bridge

The railway bridge on the Dodam-Yeongcheon line, with a total length of 480 m, carries a double-slab track with a design speed of 250 km/h.

It consists of three alternating arches and two trusses under the slab. The first (100 m), third (120 m) and fifth (100 m) single spans are buttresses, while the second and fourth spans (80) are underslab trusses.

Our mission

SYSTRA scope of work was Basic & Detailed structural Design for the 4 bridges of the lot.

The Namhangang railway bridge over Perennial Namhangang river (sometimes called Dodam Bridge) has required the greatest attention from the design team. It is a truss arch composite railway bridge. The deck and the truss arch are made of steel and the piers are in concrete and are ancored in shallow foundations.

Project key figures

  • Total length: 480m (combination of arch and truss)
  • Number of tracks: double track
  • Main span: 120m long
  • Total span: 100(arch) + 80(truss) + 120(arch) + 80(truss) + 100 (arch)

The project in pictures